perf: Fix off by one test in perf_reg_value()

The test should be >= ARRAY_SIZE() instead of > ARRAY_SIZE().

Signed-off-by: Dan Carpenter <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/arch/x86/kernel/perf_regs.c b/arch/x86/kernel/perf_regs.c
index c5a3e5cfe07f3cc61997bcd44337f63fd8a43952..e309cc5c276eaf7b2a9fa01020f14007b166875f 100644 (file)
--- a/arch/x86/kernel/perf_regs.c
+++ b/arch/x86/kernel/perf_regs.c
@@ -57,7 +57,7 @@ static unsigned int pt_regs_offset[PERF_REG_X86_MAX] = {
 
 u64 perf_reg_value(struct pt_regs *regs, int idx)
 {
-       if (WARN_ON_ONCE(idx > ARRAY_SIZE(pt_regs_offset)))
+       if (WARN_ON_ONCE(idx >= ARRAY_SIZE(pt_regs_offset)))
                return 0;
 
        return regs_get_register(regs, pt_regs_offset[idx]);